Hadronic production data from electron-positron annihilations
at low energies (around GeV order) is important input to
the understanding of the structure of hadrons and
the strong interactions of their constituent quarks.
Moreover, since hyperons are not stable, they can be studied
only in the time-like domain.
The Beijing Spectrometer (BESIII) [1]} at the Beijng Electron
Positron Collider (BEPCII) [2]} operates in the center-of-mass
energy range from 2.0 and 4.6 GeV, which is a transition region
between perturbative and non-perturbative Quantum Chromodynamics (QCD).
Using the initial state radiation (ISR) technique,
BESIII can also access energies below 2.0 GeV.
The \(e^+e^-\)  collision data that is used for QCD studies at BESIII include
an integrated luminosity of 12 pb\(^{-1}\)  at four energies
(2.23, 2.4, 2.8 and 3.4 GeV) in the continuum taken in 2012,
about 800 pb\(^{-1}\)  at 104 energies between 3.85 and 4.6 GeV taken
in the 2013-2014 run, and about 650 pb\(^{-1}\)  at 22 energies
from 2.0 to 3.08 GeV taken in 2015.
These are the so-called scan data, with moderate luminosity
at each energy point, nonetheless, for these energies
they are the largest data samples in the world.
There are also much larger samples for charm physics or XYZ particle
search, some as large as a few fb\(^{-1}\) 's at a single energy,
which are suitable for ISR-type analyses.
With these huge data samples, BESIII is uniquely well suited to make
baryon form factor measurements with unprecedentedly high precision.
